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Shifters are binding on my Madone 3.1

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Shifters are binding on my Madone 3.1

Old 06-28-12, 09:08 PM
  #1  
gforeman 
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Shifters are binding on my Madone 3.1

On the front Chainring it's really a hard push to get the lever to take the chain up to the big ring. In the back, it's a hard push moving the chain up the cassette.

I thought it was the actual shifters causing the problem, but if I put the rear in the biggest sprocket, then take all the tension off the cable (without actually moving the bike to slack the cable) the lever swings easy and smooth.

I'm thinking maybe a binding in the cables (I just lubed them, seemed okay) or, where the cables pass through that nylon guide under the BB.

I greased that guide a few months ago with Mobil 1 Sythentic Grease, just a little bit. Maybe this is the issue?

I'm going to take a toothbrush and some simple green and scrub this guide clean and dry, then try some Tri-Flo on it.

Any other suggestions?

The components on the bike are listed here:
http://www.trekbikes.com/us/en/bikes...2_compact_2012

Any help is appreciated.
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Old 06-28-12, 09:20 PM
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If the problem came on gradually with an older bike (bike or cables more than 6 months old), then cables are the most likely suspect. Note that while lubing them may provide some temporary improvement, there's a good chance that it won't entirely solve the problem. Over time the thin inner cut through the housing liners at the insides of the curves. The first to go is usually the chainstay/RD loop, but eventually the handlebar/frame sections also go.

I'd start by replacing the rear loop immediately, but be ready to replae the entire cable kit fairly soon.
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Old 06-28-12, 09:34 PM
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I'll take a look at it, the bike only has 1700 miles on it total. My old Trek 1.5 had 3K on it and never had an issue.
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Old 06-28-12, 09:39 PM
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You just need to find the right amount of tension on your cables. It's something that shouldn't be hurried, like an artisan perfecting his craft.

Revisit Park Tools tutorial, or scour Youtube for step-by-step procedures on how to do it. I was on your situation early this year, but now I feel I have that closer connection with my bike. You'll have it dialed in soon.
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Old 06-28-12, 09:45 PM
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Too many variables to say one way or another. As I said, give lubing alone a chance and/or re-place only the raster wearing RD loop. It seems to me that that the liners are wearing through faster. Possibly the liners are thinner or some of the lubes being used are softening the liner material. It might also be that with additional gears we're shifting more often making very minor gear corrections as terrain varies.

But that's just speculation, regardless of why housings aren't lasting as long (if that's for real, and not just an impression) when they wear out, they need replacing for the system to continue to work smoothly.
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Old 07-01-12, 09:55 PM
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Well, spent some time today lubing all cables, all contact points, etc. Still very stiff to shift. Guess I will have to replace the cables. Sucks, as I have to unwrap the bars to do it, and I didn't need to replace the wrap yet.

My Specialized Crux shifts like butter, so now my Madone annoys me

I'll get his sorted out.
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Old 07-02-12, 03:49 AM
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Before you unwrap your bars, you could try pulling the stem and hooking the front bit of housing straight into the RD.

Also, I doubt the BB guide is a significant source of friction. I never lube it since it's plastic, and it'll get crud all over it anyway.

Originally Posted by FBinNY View Post
reame section
What's a reame? Never heard of it.
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Old 07-02-12, 07:18 AM
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Originally Posted by Kimmo View Post
What's a reame? Never heard of it.
I's a part of a bike that only folks type with a fat fingered left hand have. Others with normal bikes and better typing skill have frames.
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Old 07-02-12, 08:08 PM
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Left the Madone at the LBS today for a new full set of cables. I will get some more quality time with my Crux. Will also get some nice Gel wrap on the bars like what is on my Crux.

Said may have by the end of the week, they are a little booked. I told them, no hurry, unless something happens to the Specialized, then I'll be camped out at their door
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Old 07-02-12, 09:44 PM
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Originally Posted by Shinjukan View Post
You just need to find the right amount of tension on your cables. It's something that shouldn't be hurried, like an artisan perfecting his craft.
Can you explain this Cable Tension? Send me a video link?
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Old 07-03-12, 01:58 AM
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Originally Posted by FBinNY View Post
I's a part of a bike that only folks type with a fat fingered left hand have. Others with normal bikes and better typing skill have frames.
Aha... say, do you use Firefox? The dictionary plugin will give you a red squiggle under made-up words, helps with typos a fair bit.
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